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| 1 // Copyright 2014 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #include <errno.h> | |
| 6 #include <unistd.h> | |
| 7 #include <sys/types.h> | |
| 8 #include <sys/stat.h> | |
| 9 | |
| 10 #include "base/logging.h" | |
| 11 #include "components/nacl/loader/nonsfi/abi_conversion.h" | |
| 12 #include "components/nacl/loader/nonsfi/irt_interfaces.h" | |
| 13 #include "components/nacl/loader/nonsfi/irt_util.h" | |
| 14 #include "native_client/src/trusted/service_runtime/include/sys/dirent.h" | |
| 15 #include "native_client/src/trusted/service_runtime/include/sys/stat.h" | |
| 16 #include "native_client/src/trusted/service_runtime/include/sys/unistd.h" | |
| 17 | |
| 18 namespace nacl { | |
| 19 namespace nonsfi { | |
| 20 namespace { | |
| 21 | |
| 22 int IrtClose(int fd) { | |
| 23 return CheckError(close(fd)); | |
| 24 } | |
| 25 | |
| 26 int IrtDup(int fd, int* newfd) { | |
| 27 return CheckErrorWithResult(dup(fd), newfd); | |
| 28 } | |
| 29 | |
| 30 int IrtDup2(int fd, int newfd) { | |
| 31 return CheckError(dup2(fd, newfd)); | |
| 32 } | |
| 33 | |
| 34 int IrtRead(int fd, void* buf, size_t count, size_t* nread) { | |
| 35 return CheckErrorWithResult(read(fd, buf, count), nread); | |
| 36 } | |
| 37 | |
| 38 int IrtWrite(int fd, const void* buf, size_t count, size_t* nwrote) { | |
| 39 return CheckErrorWithResult(write(fd, buf, count), nwrote); | |
| 40 } | |
| 41 | |
| 42 int IrtSeek(int fd, nacl_abi_off_t offset, int whence, | |
| 43 nacl_abi_off_t* new_offset) { | |
| 44 return CheckErrorWithResult(lseek(fd, offset, whence), new_offset); | |
| 45 } | |
| 46 | |
| 47 int IrtFstat(int fd, struct nacl_abi_stat* st) { | |
| 48 struct stat host_st; | |
| 49 if (fstat(fd, &host_st)) | |
| 50 return errno; | |
| 51 | |
| 52 StatToNaClAbiStat(host_st, st); | |
| 53 return 0; | |
| 54 } | |
| 55 | |
| 56 int IrtGetDents(int fd, struct nacl_abi_dirent* buf, size_t count, | |
| 57 size_t* nread) { | |
| 58 // Note: getdents() can return several directory entries in packed format. | |
| 59 // So, here, because we need to convert the abi from host's to nacl's, | |
| 60 // there is no straightforward way to ensure reading only entries which can | |
| 61 // be fit to the buf after abi conversion actually. | |
| 62 // TODO(https://code.google.com/p/nativeclient/issues/detail?id=3734): | |
| 63 // Implement this method. | |
| 64 return ENOSYS; | |
| 65 } | |
| 66 | |
| 67 } // namespace | |
| 68 | |
| 69 // For seek, fstat and getdents, their argument types should be nacl_abi_X, | |
| 70 // rather than host type, such as off_t, struct stat or struct dirent. | |
| 71 // However, the definition of nacl_irt_fdio uses host types, so here we need | |
| 72 // to cast them. | |
| 73 const nacl_irt_fdio kIrtFdIO = { | |
| 74 IrtClose, | |
| 75 IrtDup, | |
| 76 IrtDup2, | |
| 77 IrtRead, | |
| 78 IrtWrite, | |
| 79 reinterpret_cast<int(*)(int, off_t, int, off_t*)>(IrtSeek), | |
| 80 reinterpret_cast<int(*)(int, struct stat*)>(IrtFstat), | |
| 81 reinterpret_cast<int(*)(int, struct dirent*, size_t, size_t*)>(IrtGetDents), | |
| 82 }; | |
| 83 | |
| 84 } // namespace nonsfi | |
| 85 } // namespace nacl | |
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